Matematika

Pertanyaan

1. (2x+5)^3=

2. (4x+2)^3=

Bantu jawab..

1 Jawaban

  • 1. (2x+5)^3
    = (2x + 5)(2x + 5)(2x + 5)
    = (4x^2 + 10x + 10x + 25) ( 2x + 5 )
    = (4x^2 + 20x + 25) (2x + 5)
    = 8x^3 + 40x^2 + 50x + 20x^2 + 100x + 125
    = 8x^3 + 60x^2 + 150x + 125

    2. (4x+2)^3
    = (4x + 2)(4x + 2) (4x + 2)
    = (16x^2 + 8x + 8x + 4) (4x + 2)
    = (16x^2 + 16x + 4)(4x + 2)
    = 64x^3 + 64x^2 + 16x + 16x^2 + 32x + 8
    = 64x^3 + 80x^2 + 48x + 8

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